Saw treating and grinding machine



2 Sheets-Sheet l S. A. HALL SAW TREATING AND GRXNDING MACHINE Filed 00T.. 19, 1945 Feb. 17, 194s.

Feb. 17, 1948. s. A. HALL SAW TREATING AND GRINDING MACHINE Filed Oct. 19, 1945 2 Sheetsfsheet 2 Patented Feb. 17, 1948 t UNITED STATES `.PATENT .oFEIcE This invention relates to improvements in saw treating and grinding machines, more particularly to circular saw treating and sharpen-4 ing machines.

It is an object of my invention to provide a mounting unit for a circular saw whereby it may be supported on an adjustable table for sliding movement thereon. l l,

It is an object of my vinvention to provide an adjustable table having a slot to receive a grinding wheel which projects through the table and its slot.

It is an object of my invention to provide a saw supporting unit in which the saw may be adjusted arcuately step by step to treat each succeeding tooth and gullet of theA saw by the grinding wheel. Y-

Other objects and advantages will be revealed in connection with a detailed description of the accompanying drawings which form a part of this specification.

In the drawings:

Figure l is an elevational view of the machine viewing it from one end of the table.

Figure 2 is a centrally located longitudinal, vertical sectional view taken on the line 2--2 of Figure 1 looking in the direction of the arrows.

Figure 3 is an elevational view on an enlarged scale, of the shaft supporting bushing for the same.

Figure 4 is an elevational view of the saw` clamping and supporting shaft.

Figure 5 is an edge elevational view of an angularly and longitudinally adjustable arm to maintain the saw in the desired arcuate position of adjustment, and f Figure 6 is a front `elevational view of the same.

The drawing is merely illustrative of my invention and not denitive thereof except as specified in the subjectmatter claimed. y l

The reference characters identify the particular details of my invention as herein pointed out.

In the drawings the table top I is adjustable vertically by means (not shown) and is provided with a longitudinal slot to receive the upper por-V tion of a grinding or treating wheel 3. wheel 3 is xedly mounted on a shaft 4 located below the table top I. The shaft 4 is mounted in bearings supported by brackets or the like beneath the table top. The table top l is provided with means (not shown) whereby the table top may be elevated or depressed to expose more or less of the grinding wheel 3 above the table top. The shaft 4 has its axis relativen in a fixed 3 Claims. (Cl. i6-43) location.

The saw supporting unit 5 is slidably located upon the table top I and comprises an upright substanially rectangular body B of considerable thickness to provide substantial area for iixedly securing guide rails 1, 8 thereto. The rails 1, 8 are arranged parallel to each other and transversely of said unit 5. The table top is provided with channels or grooves 9, I0 to receive and guide the rails 1 and 8.

The body B is provided with a vertical sloil I I to accommodate the grinding wheel as the unit 5 slides to and fro over it. The body 6 is also provided with a'horizontal slot I2 whereby the saw I3 and its mountings may be adjusted longitudinally of the body 6 and transversely of the table top I.'

rihe mountings for the saw I3 include a bushing I4 having a thickness substantially equal to the'width of the slot I2. The bushing I4 is provided with screw threads I5 to receive the nut I6 on one end thereof. A plate I1 is secured to the opposite end of the bushing I4 by screws I8, IS

having their heads countersunk into the plate. The bushing I4 receives a supporting shaft 20 having one reduced end portion providing/a shoulder 2l. The opposite ends of the shaft are provided with screw threads 22 and 23 to receive respectively the nuts 24 and 25. The reduced end portion of the shaft 22 passes through the center of the-saw and its supporting disks 26 and 21. The disks are clamped between the shoulder 2| and l the nut 24 tormly'hold the saw. The shaft 2B is provided with a lock nut 25' to cooperate withthe nut 25 since the saw and its supporting shaft 20 must" provide for the step by step adjustmentV of the saw and its teeth 28 and the intervening gullets 29.

The body 6 is provided with an adjustable arm 32 which isrprcvided with a long longitudinal slot 33 whereby it may be secured to the rear outside of the body 6 by a'bolt 30. The bolt is provided with Va winged nut 34 whereby the arm'may be readily adjusted. The lower end portion of the arm is provided with a boss 35 which extends' inwardly through the notch II to engage the saw lightly. The lower end of the arm and its boss are apertured to receive a slidable detent 36 having a knob 31' on'its outermost exposed end. The detent is actuated toward the saw and into the gullets thereof by a slotted leaf'spring 38. An annular groove 39 in the detent receives the slotted end of the leai spring and the opposite end of the spring is secured to the arm by suita'-,

ble fastenings such as nails, screws, rivets. bolts, etc.

The rails 1 .and 8 projecting from opposite sides of the unit 5 and above the surface of the table top l may serve as handles to reciprocate the unit to and fro over the rotating wheel 3. Of course additional means (not shown) may be provided to serve as handles for reciprocating the unit.

The disks 2.6i and' 2,7." are considerably smaller maintain the adiustmentfor the proper amount oi' friction the shaft 29 is provided with a. look. nut 25j to! cooperate with 1ehenutv 21.53.

Now.l the saw must be properly adjusted tot thev grinding wheel 3. This is.-` drone. by bringing one of` the gu-lilets 29 over the. highest. spot on' the wheel and if. adjustment transversely of. the wheel and tafble top is. required the nut IB- is, loosened and. thief-proper transverse adjustmentis made and then the nut i6 is: tightened lto maintain. such adjustment. If the wheel does, not enter deeply enough,- into the gullet then the tabletop is lowered to a. proper adjustment by means (not shown-)8. Orr thel other hand ifthesaw is tooflow the table may be raised accordingly.. When both'. adjustments of the saw are made then the arm l3-2 and itsdetent 36 are. adjusted to intothe next gullet clockwise of the one over the grinding Wheel; and secured in. position.

. After the grind-ing of the rst g-ufllet. and its tooth 28 the arm 32 `a-nd its detent'araieadfjusted to the newly ground gullet which should be a final adiiustment for that particular saw which will insure that all of the gullets are ground to an equal depth'.

The: unit 5 is shiftedl to and fro over the rotating grinding. Wheel by man; power, preferably one man on. each side-of the table.. .Each man may grasp one of the rails operating in: unison propel! the unit back and 'forth over the wheel.

Whenone saw is finished itl is; removed trom the unit the machine'iis: now-ready to receive another saw for adjustment and treatment.

Having fully shownV and described my invention, what I claim is:

l. In a. saw treating machine thesub-combination comprisinga sawsupporting unit for circular saws, means ifn'said. unit supporting said saw4 for both angular and bodily adjustment, in combination with an arm mounted on' the outsidev of said unit in engagement with said saw, said arm hav- Inga slot receiving a, bolt, said bolt havin-ga nut whereby saidarm may be secured inadjusted. position, sai-d arm having a'boss @noone of itsv ends 'and extending laterally vtherefrom and toward said saw, said armand its boss-being apertured and slidably receiving a detent, said detent being actuated toward 'the saw :by a leaf spring secured to said arm, said'detent having a knob whereby it may be withdrawn from .engagement with the saw.

2. In a saw-grinding machine, a vertically adjustable table, a slot in said table, a rotatable grinding disk journaled below said table and projecting upwardly through the slot therein, a saw support mounted for slidable movement along said table chordally of said grinding disk, a vertically disposed slot in said saw support providing clearance for said grinding disk, a horizontally disposed slot in said saw support, a bushing and shaft. adapted to. support; av saw engagement with' said grinding disk positioned in said horizontally disposed slot for movement transversely of the grinding disk, and a work-indexing lever pivotallyr mounted: on said saw support, said workindexing lever having a spring-biased plunger in its outer end'ad'apted to be positioned in a tooth oi, 3,-, saw mounted by said bushing and shaft arcuately spaced from the tooth being ground.

3f. In asaw-treating machine, the combination with a slotted table top having a rotatable grinding wheel extending partly through the top thereof, of aunit adaptedl to support a, saw to be treated andt mounted for reciprocal movement with respect to said wheel, said unit including anv upstanding body portion having a horizontally-disposed slct extending transversely therethrough, a hollow tubular bushing slidably mounted Within said slot, a plate on an end of said bushing and carried thereby, a shaft extending through said bushing and said plate and adjustably mounted in said; bushing, a. rst disk loosely mounted on said shaft and arranged in abutting relation With respect to said plate, a second disk loosely mounted on said shaft and arranged to hold a sawin abutting relation with respect to said disk,

means on,` the end oi said shaft adjacent saidl second-named disk for fxedly locki-ng said disks in assembled relation, and indexing means mounted on the outside of said unit, said indexing means including an arm having a boss on its outer end, and a withdrawable detent slidably mounted in said boss and actuable in one direction tosuccessively engage the gullets of the saw when supported on said unit.

y SAMUEL A. HALL.

REFERENCESv CITEDv The following references are of record inthe 'lel of this patent:

UNITED STATES PATENTS Number Name Date 46,951 Sparks Mar. 21, 1865 -385,693 Blackmer July 10, 1888 2,130,965 Porter Sep. 20, 1938 1,669,941 Kennedy May l5, 1928 1,938,548 Tautz Dec. 5, 1933 2,075,282 Hedgpeth Mar. 30, 1937 1,719,601;v Eisenberg July 2, 1929 204,462r Watson May 28, 1878 264,021 Agan Sept. 5, 1882 1,135,245 Zuleg- Apr. 13, 1915 2,293,231 Weiland Aug. 18, 1942 .614,247 Goodhew etal. Nov. 15, 1898 727,981 Lomasney May 12, 1903 1,198,258. Medhurst Sept. 12, 1916 1,230,111 Callaway June 19, 1917 1,295,156 Gorham Feb. 25, 1919 

